ÿWPC# 9@ièÈÿKÕC›WANj8Óön7¯ùvãg,*ÙìÑi*KE/ÿ°")‘ëÎï½ðWä!Åÿ)@ö¢©Ô(„†BŠø`Vu)/cÒ Pb(>·4ÇCN>Iˆ¾à§“å'ûáÖP·Ø¡õ­ÚÓR °$$™ØÃÐIúV”Ð}E…ò+®§Q£Ú9À·7^I5í=ÀU;”Í®ª,ï;À4zg~η XB¬ÂÌd‚§9ިŰgþUH`^Œd™NEqzkú!JÒcôN¦£²é±Ç3™4ÓS-$‡]óy ö`t³×FÔ‹p‚ŠÂ¹®e=ÏÛ†]œÇä‰ýÍ– ¼/gQ°¾‡QïãÓ$ß“ŽÕÏS}¤YM—ciw¢èB'=‡_”uFޏ!GÔúáA smÇ‘wñÑÎ-îRèâ‚]S©¥ MW=Ï=–ï^‹/ïl .£šú’e¤ÍýAm3p?[u½6WÞ©ž_ï´a£R E˜ )gï”úî÷vÝ1§0O_³·Æù”3Sq‰eÇÀVQQ{p²‘gk$C‘BÐô.Í›iM ¥¿ÍáË+x활Ô!HXì|°‡zñ¨:œIê.UZKR˜«8êÝœÈn‰U@¤ %äU:ê=$ 0OaE °UB²œô 0Oß÷| 0O‹ Ú nê 04í B ! > S> U:‘ UBË ž U:«å€ýU:}UB·wù4*ÕÅ  `(CG TimesScalableX<þ6X9`("Courier 10cpi 3Ý ƒ?Ð(ÝÓ  ÓÝ  ÝÔ€X{èXXXÔÌß?€' °°xdE°°x?ßÓ  ÓÔ€X±ûXXX{èÔEMISSION€MEASUREMENT€CENTERÐ „Ô ÐGUIDELINE€DOCUMENTÌß?€' °xdE°Cx?ß('2?Ð$¨¨Ý ƒ¤T!ÝÓ  ÓÝ  Ý<Ð 9(*Courier 10cpiBold ’Ý ƒ ?Ð)ÝÓ  ÓÝ  ÝÔ€X{èXXXÔß?€' °°xdE°¯x?ßÐ ° ÐPrepared€by€Emission€Measurement€Center€à€xxA(#àEMC€GD„036ˆÐ ¿ ÐEmission€Measurement€Center,€OAQPS,€EPAà€¨¨;(#àFebruary€7,€1995ˆÐ “ã Ðß?€' °PxdE°fx?ß('2?Ð$©©Ý ƒ¤T!ÝÓ  ÓÝ  Ý Ö€Ö Ö€ Ö rÝ ƒ ?Ð'ÝÓ  ÓÝ  ÝÔ€X{èXXXÔÌß?€' °°xdE°°x?ßÔ€X±ûXXX{èÔEMC€GD„036€à@ˆˆˆìàEMC€GUIDELINE€DOCUMENT€ˆà€X X X (#àPAGE€Ô@  ÔÚ  Ú2Ú  ÚÔA  ԈР„Ô Ðß?€' °@xdE°cx?ß('2?Ð$§§Ý ƒ¤T!ÝÓ  ÓÝ  Ý3|w«*ÕÅ  `(CG TimesScalableXXwÕÅ P쉊7ûXP<þ6X9`("Courier 10cpileXôxþ6X@É“8Ç;X@<Ð 9(*Courier 10cpiBoldXôxÐ àÉ•BÇ;X€( ¤T$¡¡Ó  Ó d IÝ ƒ?Ð(ÝÓ  ÓÝ  ÝÔ€X{èXXXÔÌß?€' °°xdE°°x?ßÓ  ÓÔ€X±ûXXX{èÔEMISSION€MEASUREMENT€TECHNICAL€INFORMATION€CENTERÐ „Ô ÐGUIDELINE€DOCUMENTÌß?€' °xdE°Cx?ß<þ6X9`("Courier 10cpi<Ð 9(*Courier 10cpiBold ”Ý ƒ ?Ð)ÝÓ  ÓÝ  ÝÔ€X{èXXXÔß?€' °°xdE°¯x?ßÐ ° ÐPrepared€by€Emission€Measurement€Center€à€ˆˆ?(#àEMTIC€GD„036ˆÐ ¿ ÐEmission€Measurement€Center,€OAQPS,€EPAà€¨¨;(#àFebruary€7,€1995ˆÐ “ã Ðß?€' °PxdE°fx?ß<þ6X9`("Courier 10cpi Ö€Ö vÝ ƒ ?Ð'ÝÓ  ÓÝ  ÝÔ€X{èXXXÔÌß?€' °°xdE°°x?ßÔ€X±ûXXX{èÔEMTIC€GD„036€à@ìàEMTIC€GUIDELINE€DOCUMENT€ˆà€X X X (#àPAGE€Ô@  ÔÚ  Ú2Ú  ÚÔA  ԈР„Ô Ðß?€' °@xdE°cx?ß<þ6X9`("Courier 10cpi<Ð 9(*Courier 10cpiBoldô{‡$Ý ƒ¤T!ÝÓ  ÓÝ  ÝÔ€X{èXXXÔÑ  Ñò òññÖ€ÿÿÖññññÖ€ÿÿÖññññÖ€ÿÿÖññññÖ€ÿÿÖññÑ,°ÑÌà@””%ìàMEMORANDUMó óˆÐ ûà ÐÌò òà0  àà0` (#(#àà  àà ° àSUBJECT:ó óà ` àRevised€Capture€Efficiency€Guidance€for€Control€ofÐ ¯ ” ÐVolatile€Organic€Compound€EmissionsÐ ` (#` (# ÐÌò òFROM:ó óà ` àJohn€S.€Seitz,€DirectorÐ 7  Ðà  àà ` àOffice€of€Air€Quality€Planning€and€Standards€(MD„10)ÌÌò òTO:ó óà  àà ` àDirector,€Air,€Pesticides€and€Toxic€Management€à Ð àÐ ¿¤  Ðà  àà ` àDivision,€Regions€I€and€IVÌà  àà ` àDirector,€Air€and€Waste€Management€Division,€Ìà  àà ` àà ¸ àRegion€IIÌà  àà ` àDirector,€Air,€Radiation€and€Toxics€Division,Ìà  àà ` àà ¸ àRegion€IIIÌà  àà ` àDirector,€Air€and€Radiation€Division,Ìà  àà ` àà ¸ àRegion€VÌà  àà ` àDirector,€Air,€Pesticides€and€Toxics€Division,Ìà  àà ` àà ¸ àRegion€VIÌà  àà ` àDirector,€Air€and€Toxic€Division,Ìà  àà ` àà ¸ àRegions€VII,€VIII,€IX,€and€XÌÌÌà  àIn€a€memorandum€dated€March€20,€1992,€I€announced€that€theÏOffice€of€Air€Quality€Planning€and€Standards€(OAQPS)€wasÏundertaking€a€study€to€find€less€expensive€alternatives€to€ourÏcurrent€temporary€total€enclosure€(TTE)€methods€for€determiningÏcapture€efficiency€(CE)€performance€of€volatile€organic€compoundÏ(VOC)€emission€control€systems.€€I€also€announced€that€during€theÏperiod€of€this€study€the€Environmental€Protection€Agency€(EPA)Ïwas€instituting€a€limited€moratorium€suspending€temporarilyÏcertain€CE€testing€and€related€enforcement€activities.ÌÌà  àThe€purpose€of€this€memorandum€is€three-fold:€(1)€to€releaseÏthe€attached€technical€document€entitled€"Guidelines€forÏDetermining€Capture€Efficiency"€which€presents€details€of€the€EPAÏapproved€test€methods€for€determining€CE;€(2)€to€provide€you€withÏrevised€guidance€on€implementing€these€CE€test€methods;€and€(3)Ïto€announce€the€end€of€the€CE€moratorium€and€to€provide€you€withÏguidance€on€moratorium€closure.ÌÌòòBackgroundóóÐ K*0") ÐÌÑ€ ÑññÑ€ ÑññññÑ€Ñññà  àAs€you€know,€the€measurement€of€CE€is€critical€toÏdetermining€the€effectiveness€of€VOC€emission€control€systems.€ÏOur€current€TTE€test€methods€are€the€products€of€an€extendedÏinvestigation€by€EPA€over€7€years€in€response€to€the€needÐ o.T&. ÐÑ   ÑÖ€£ÖÖ€ ÿÿÖÑ  ÑññÑ   ÑÖ€£ÖÖ€ ÿÿÖÑ  ÑÑ   ÑÖ€£ÖÖ€ ÿÿÖÑ  ÑññññÑ   ÑÖ€£ÖÖ€ ÿÿÖÑ  ÑÑ   ÑÖ€ÖÖ€ ÖÑ  Ñññidentified€a€number€of€years€ago€by€the€EPA€Regional€OfficesÏ(RO's)€as€being€essential€to€compliance€determination€efforts.€€ÌÌà  àWe€received€a€number€of€comments€from€industry,€States,ÏRO's,€and€others€expressing€concern€about€the€cost€of€using€ourÏrecommended€gas„gas€and€liquid„gas€methods€that€specify€a€TTE€toÏmeasure€CE.€€In€light€of€the€President's€instructions€to€reviewÏFederal€regulations€for€ways€to€minimize€their€cost€to€industry,ÏOAQPS€in€March€1992€embarked€on€a€12-month€study€to€develop€andÏreview€possible€alternatives€and€the€effect€that€their€approvalÏwould€have€on€programs€to€assure€volatile€organic€compoundÏemissions€reductions.€€Clearly,€when€the€study€began,€we€did€notÏknow€of€less€costly€methods€with€measurement€capabilitiesÏequivalent€to€those€methods€using€the€TTE.€€ÌÌà  àTo€ensure€that€all€aspects€of€the€issue€were€considered,€theÏstudy€was€a€cooperative€effort€involving€all€the€divisions€inÏOAQPS.€€I€would€also€like€to€thank€the€Can€ManufacturersÏInstitute€(CMI)€for€their€participation€in€the€study.€€TheÏcomparison€field€test€CMI€conducted€not€only€demonstrated€thatÏthe€TTE€methods€are€the€most€precise€procedures€available€forÏdetermining€CE€but€also€provided€useful€data€in€the€developmentÏof€the€approved€alternative€CE€protocols.€€ÌÌà  àThe€CE€study€and€moratorium€were€extended€beyond€ourÏoriginally€planned€12€months€to€utilize€the€additional€data€fromÏthe€CMI€field€test€and€more€detailed€analyses€of€CE€protocolÏoptions.€€Our€CE€study€was€completed€in€early€November€of€thisÏyear.ÌÌòòGuidelines€for€Determining€Capture€Efficiency€DocumentóóÐ  Ø ÐÌà  àThe€attached€document,€"Guidelines€for€Determining€CaptureÏEfficiency,"€provides€the€technical€details€of€the€EPA€approvedÏCE€test€methods,€including€the€data€quality€objective€(DQO)€andÏlower€confidence€limit€(LCL)€test€methods€recently€developedÏduring€OAQPS's€CE€study.€€Appendix€A€contains€a€completeÏdescription€of€the€TTE€test€methods,€incorporating€several€minorÏrevisions,€such€as€reduced€length€of€test€runs,€to€the€TTE€testÏmethods€provided€in€earlier€documents.€€Any€future€referenceÏcitations€regarding€EPA's€TTE€test€methods€should€be€made€toÏAppendix€A€of€this€document.ÌÌà  àThis€guideline€document€presents€the€TTE€methods€as€EPA'sÏrecommended€procedures.€€As€indicated€from€our€earlierÏinvestigation€leading€to€the€development€of€the€TTE€methods€andÏconfirmed€by€the€CMI€field€study,€the€TTE€methods€are€the€mostÏprecise€procedures€for€measuring€CE.€€ÌÐ û.À'0 Ðà  àNevertheless,€to€provide€flexibility€and€to€reduce€costs,ÏEPA€has€developed€two€alternative€methods,€DQO€and€LCL,€forÏdetermining€CE€which€do€not€require€a€TTE.€€Moreover,€theseÏalternatives€offer€additional€flexibility€in€that€they€do€notÏrequire€specific€testing€procedures€for€measuring€processÏparameters€and€for€liquid€and€gas€analyses;€but€only€specify€aÏlimited€set€of€guidelines€on€the€data€quality.€€The€DQO€and€LCLÏmethods€are€sets€of€approval€criteria€which,€when€met€by€the€dataÏobtained€with€any€given€protocol€of€process€parameter€measurementÏprocedures,€may€be€used€to€determine€VOC€capture€systemÏcompliance€with€a€CE€standard.ÌÌà  àTo€add€further€flexibility,€the€guideline€document€alsoÏdescribes€an€aggregate€sampling€method€where€the€building€may€beÏused€as€an€enclosure€for€testing€and€for€multiple€lines€whichÏshare€a€common€VOC€control€device€such€as€an€incinerator€orÏadsorber€system.ÌÌòòImplementation€of€Capture€Efficiency€GuidanceóóÐ #è ÐÌà  àIn€accordance€with€the€technical€guidance€provided€in€theÏattached€document€"Guidelines€for€Determining€Capture€Efficiency"Ïand€the€policy€guidance€set€forth€here,€the€EPA€recommends€theÏuse€of€these€TTE€and€alternative€test€methods€to€the€States€andÏlocal€agencies€for€determining€CE.€€ÌÌà  àFor€the€purpose€of€CE€testing€to€determine€compliance€withÏVOC€Reasonably€Available€Control€Technology€(RACT)€requirements,Ïany€of€the€CE€testing€methods€described€in€the€attached€documentÏare€acceptable€to€EPA.€€Such€testing€includes€initial€complianceÏcertification,€enforcement€actions€where€noncompliance€isÏsuspected,€and€periodic€testing€as€may€be€required€pursuant€toÏEPA's€enhanced€monitoring€rules.€€The€LCL€should€not€be€used,Ïhowever,€for€enforcement€purposes€to€confirm€noncompliance;Ïsufficient€test€runs€should€be€run€to€meet€the€DQO€protocol.ÌÌà  àTo€allow€the€use€of€the€aggregate€sampling€method€for€CEÏcompliance€determinations,€the€State€should€provide€in€its€SIPÏthat€aggregate€sampling€requires€a€site-specific€SIP€or€FIPÏrevision€to€establish€a€federally€€enforceable€CE€RACT€for€theÏbuilding.€€The€building€RACT€should€provide€VOC€emissionÏreductions€equivalent€to€the€reductions€obtained€when€all€the€VOCÏemission€sources€within€the€building€are€meeting€their€individualÏRACT.€€In€testing€multiple€lines€connected€to€a€common€controlÏdevice€as€a€group,€the€CE€determined€for€the€group€should€complyÏwith€the€highest€(most€stringent)€CE€RACT€of€any€individual€lineÏin€the€group.Ìâ âÐ '.ì&/ Ðà  àIn€those€situations€where€CE€testing€is€done€to€determineÏâ âemission€reductions€for€the€purpose€of€establishing€emissionÏcredits€for€offsets,€shutdowns,€and€trading,€the€LCL€method€isÏnot€appropriate€for€these€applications.€€Sources€who€have€usedÏthe€LCL€method€for€CE€compliance€determinations,€however,€may€useÏtheir€same€testing€procedures€and€perform€sufficient€test€runs€toÏmeet€the€requirements€of€the€DQO€method.ÌÌà  àStates€that€have€already€adopted€the€TTE€test€methods€intoÏtheir€SIPs€and€want€to€allow€the€use€of€any€or€all€of€theseÏalternative€methods€should€revise€their€SIPs€accordingly.€€ÌÌà  àFor€those€States€which€did€not€adopt€CE€test€methods€and/orÏcompliance€regulations€in€their€SIPs,€they€should€submit€to€EPAÏas€soon€as€possible€SIPs€with€complete€CE€rules€in€accordanceÏwith€the€1990€Clean€Air€Act€Amendments€(CAAA).ÌÌà  àWith€regard€to€FIPs,€I€am€requesting€that€Regional€OfficesÏmake€the€necessary€revisions€as€soon€as€possible€to€the€FIPS€inÏtheir€regions€to€allow€the€use€of€CE€test€methods€described€inÏthe€attached€technical€guidance€and€to€make€the€FIPs€consistentÏwith€the€CE€policy€set€forth€here.ÌÌà  àThe€EPA€wishes€to€expedite€making€this€CE€guidance€availableÏto€the€State€and€local€agencies,€industry,€and€the€public.€€I€amÏtherefore€requesting€that€Regional€Offices€distribute€copies€ofÏthis€memorandum€and€its€attachment€to€the€appropriate€contacts€inÏthe€State€and€local€agency€offices€within€their€regions.€€This€CEÏguidance€is€also€being€made€available€on€EPA's€TTN€bulletinÏboard.ÌÌòòCapture€Efficiency€Moratorium€ClosureóóÐ ç ¬ ÐÌà  àWith€the€CE€study€now€completed,€I€am€announcing€the€end€ofÏthe€CE€moratorium€which€has€been€in€effect€since€March€20,€1992.€ÏThe€effective€date€for€termination€of€the€moratorium€is€€€€€ÏFebruary€15,€1995.ÌÌà  àI€am€asking€the€Regional€Offices€to€notify€the€appropriateÏauthorities€in€the€State€and€local€agency€offices€within€theirÏregions€that€the€CE€moratorium€is€ending€and€to€inform€thoseÏauthorities€of€those€actions€they€need€to€take€to€resume€CEÏcompliance€determinations€suspended€by€the€moratorium.ÌÌà  àIf€you€have€any€questions€concerning€the€guidance€documentÏplease€contact€Candace€Sorrell€at€(919)€541„1064.€€All€policy€andÏimplementation€questions€should€be€directed€to€Bob€Stallings€atÏ(919)€541„7649.ÌÐ û.À'0 ÐAttachmentÌÌcc:à  àAir€Programs€Branch€Chief,€Regions€I„XР㨠Ðà  àAir€Compliance€Chief,€Regions€I„Xà p àÐ · | Ðà  àVOC€Compliance€Work€GroupÌà  àVOC€Policy€Work€GroupÌà  àEnvironmental€Services€Division,€Regions€I„XÌà  àOffice€of€Regional€Counsel,€Regions€I„XÐ   Ì Ðbcc:à  àAnn€Bailey€(2242A)Ð ; Ðà  àJim€Berry€(MD13)Ìà  àRich€Biondi€(2223A)Ìà  àDavid€Cole€(MD„15)Ìà  àTom€Eagles€(6103)Ìà  àTerence€Fitz„Simmons€(MD„14)Ìà  àTom€Helms€(MD„15)Ìà  àLinda€Herring€(MD„13)Ìà  àSteve€Hitte€(MD„15)Ìà  àWilliam€F.€Hunt,€Jr.,€(MD„14)Ìà  àBruce€Jordan€(MD„13)Ìà  àGary€McAlister€(MD„19)Ìà  àDavid€Misenheimer€(Md„19)Ìà  àJohn€Rasnic€(2223A)Ìà  àBill€Repsher€(2248A)Ìà  àDave€Salman€(MD„13)Ìà  àSally€Shaver€(MD„15)Ìà  àCandace€Sorrell€(MD„19)Ìà  àBob€Stallings€(MD„15)Ìà  àHenry€Thomas€(MD„14)Ìà  àJan€Tierney€(2344R)Ìà  àLydia€Wegman€(MD„10)Ìà  àSusan€Wyatt€(MD„13)Ì